How old do you have to be to fly free on Spirit?

Lap Children: From 7 days old until his/her second birthday (age 7 days to 23 months), a child is considered a lap child and does not need a paid seat; however, Guests may opt to buy a seat for the infant if they prefer. There are additional requirements for traveling with a lap child, click here to learn more!



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Ticket fares for babies and children On domestic flights, infants under the age of two often fly for free if seated on their parent's lap, and some airlines charge a (discounted) fare. On international flights, airlines often charge 10% of the adult ticket price.

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Child age at the time of unaccompanied travel Children ages 15-17 are permitted to travel as a standard passenger, Go to footer note, provided they can present a valid ID to security personnel. If parents or guardians prefer, they can also travel as an unaccompanied minor.

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The minimum age for children to travel alone as adults paying adult fares varies: Kids have to be 12 years old to fly alone on domestic flights with Hawaiian, Southwest, Air Canada, and WestJet; 13 years old on Alaska; 14 years old to fly as an adult on JetBlue; and 15 years old on Allegiant, American, Delta, Frontier, ...

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Unaccompanied minors can travel on both domestic and international flights, as long as it is nonstop on United or United Express. Young adults ages 15 to 17 can travel alone on any United or United Express flight, or they can choose to opt into the unaccompanied minor service.

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To prove your child's age to an airline, one of the following documents will suffice: Child's passport (how to get a U.S. passport for an infant and things to know about children's passports) Child's birth certificate. Child's immunization form or other medical records may also work domestically.

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Spirit currently has no official family seating policy. It only states that it can't guarantee that you'll sit with your friends and family if you don't purchase seat assignments; it says that gate agents will work to provide adjacent seats for guests flying with children aged 13 and under whenever possible.

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Travel Restrictions and Required Documentation Is your child two years old? Or turning two years old en route? If yes, then a seat is required to be purchased for all flights in which your child is 2 years old.

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Friends or acquaintances may tell you that age verification is not required for your lap child, but that is absolutely not true. While children don't need an ID for TSA, to fly as a lap infant and document to the airline that they are indeed under 2 years old, you need to be prepared.

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International travel Some airlines automatically apply the unaccompanied-minor procedures to kids through age 17 on international flights, and charge the standard unaccompanied-minor fee if applicable. Children must usually have the same passport, visa or other international entry documentation required of adults.

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The minimum age for children to travel alone as adults paying adult fares varies: Kids have to be 12 years old to fly alone on domestic flights with Hawaiian, Southwest, Air Canada, and WestJet; 13 years old on Alaska; 14 years old to fly as an adult on JetBlue; and 15 years old on Allegiant, American, Delta, Frontier, ...

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Most U.S. airlines will permit children who have reached their fifth birthday to travel unaccompanied. Kids ages 5 through 11 who are flying alone must usually travel pursuant to special “unaccompanied minor” procedures. On some airlines, these procedures are required for unaccompanied children as old as 14.

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Write out the details: Anyone younger than 17 flying alone on an international flight must have a signed note from a parent or guardian giving permission, destination and length of stay.

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Children ages 15-17 are permitted to travel as a standard passenger, Go to footer note, provided they can present a valid ID to security personnel. If parents or guardians prefer, they can also travel as an unaccompanied minor.

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We do not carry unaccompanied children under 16. We cannot provide an escort or special facilities.

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Typically, minors under the age of 18 do not have to present identification for domestic U.S. travel. Airlines will accept identification from the responsible adult on behalf of the minor(s). For international travel, minors under the age of 18 must present the same travel documents as the adult.

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